Public Health and Nutrition
A recent study suggests that the number of steps walked per day is strongly associated with good health.8 A person's heart rate indicates how hard the heart is working to circulate blood throughout the body and is a measure of health. A lower resting heart rate may reduce the risk of heart attack and stroke, and also increase endurance. A random sample of adults between 35 and 40 years old was obtained, and each person wore a pedometer for a day. The number of steps taken, x, was recorded, and the next day the resting pulse rate (beats/minute), y, for each person was also measured.
a. Find the estimated regression line and explain the meaning of the estimated coefficient β^ = 1.
b. Complete the ANOVA table (without the p value), and find and interpret the coefficient of determination.